Magnetic-buoyancy-induced mixing in AGB stars: presolar SiC grains
Isotope ratios can be measured in presolar SiC grains from ancient asymptotic giant branch
(AGB) stars at permil-level (0.1%) precision. Such precise grain data permit derivation of …
(AGB) stars at permil-level (0.1%) precision. Such precise grain data permit derivation of …
Presolar grain isotopic ratios as constraints to nuclear and stellar parameters of asymptotic giant branch star nucleosynthesis
Recent models for evolved low-mass stars (with M≲ 3 M⊙), undergoing the asymptotic giant
branch (AGB) phase assume that magnetic flux-tube buoyancy drives the formation of 13 C …
branch (AGB) phase assume that magnetic flux-tube buoyancy drives the formation of 13 C …
s-processing in AGB stars revisited. III. Neutron captures from MHD mixing at different metallicities and observational constraints
We present post-process neutron-capture computations for Asymptotic Giant Branch (AGB)
stars of 1.5–3 M⊙ and metallicities− 1.3≤[Fe/H]≤ 0.1. The reference stellar models are …
stars of 1.5–3 M⊙ and metallicities− 1.3≤[Fe/H]≤ 0.1. The reference stellar models are …
Re-evaluation of the Ne()Mg and Ne()Mg reaction rates
The competing $^{22} $ Ne ($\alpha,\gamma $) $^{26} $ Mg and $^{22} $ Ne ($\alpha, n $)
$^{25} $ Mg reactions control the production of neutrons for the weak $ s $-process in …
$^{25} $ Mg reactions control the production of neutrons for the weak $ s $-process in …
Magnetic-buoyancy-induced mixing in AGB stars: Fluorine nucleosynthesis at different metallicities
Asymptotic giant branch (AGB) stars are considered to be among the most significant
contributors to the fluorine budget in our Galaxy. While observations and theory agree at …
contributors to the fluorine budget in our Galaxy. While observations and theory agree at …
The importance of the 13C (α, n) 16O reaction in asymptotic giant branch stars
S Cristallo, M La Cognata, C Massimi… - The astrophysical …, 2018 - iopscience.iop.org
Low-mass asymptotic giant branch stars are among the most important polluters of the
interstellar medium. In their interiors, the main component (A≳ 90) of the slow neutron …
interstellar medium. In their interiors, the main component (A≳ 90) of the slow neutron …
Trojan Horse investigation for AGB stellar nucleosynthesis
Asymptotic Giant Branch (AGB) stars are among the most important astrophysical sites
influencing the nucleosynthesis and the chemical abundances in the Universe. From a pure …
influencing the nucleosynthesis and the chemical abundances in the Universe. From a pure …
Origin of large meteoritic SiC stardust grains in metal-rich AGB stars
M Lugaro, B Cseh, B Világos, AI Karakas… - The Astrophysical …, 2020 - iopscience.iop.org
Stardust grains that originated in ancient stars and supernovae are recovered from
meteorites and carry the detailed composition of their astronomical sites of origin. We …
meteorites and carry the detailed composition of their astronomical sites of origin. We …
New constraints on the major neutron source in low-mass AGB stars
We compare updated Torino postprocessing asymptotic giant branch (AGB) nucleosynthesis
model calculations with isotopic compositions of mainstream SiC dust grains from low-mass …
model calculations with isotopic compositions of mainstream SiC dust grains from low-mass …
Additional fluorine abundance determinations in evolved stars
C Abia, S Cristallo, K Cunha, P De Laverny… - Astronomy & …, 2019 - aanda.org
We present new fluorine abundance measurements for a sample of carbon-rich asymptotic
giant branch (AGB) stars and two other metal-poor evolved stars of Ba/CH types. The …
giant branch (AGB) stars and two other metal-poor evolved stars of Ba/CH types. The …